Laplacian Pyramid Generator

Creates a Laplacian pyramid from the input image. More...

Functions
VPIStatus	vpiSubmitLaplacianPyramidGenerator (VPIStream stream, uint32_t backend, VPIImage input, VPIPyramid output, VPIPyramid gaussianPyr, VPIBorderExtension border)
	Computes the Laplacian pyramid from the input image. More...

Detailed Description

Creates a Laplacian pyramid from the input image.

Function Documentation

vpiSubmitLaplacianPyramidGenerator()

VPIStatus vpiSubmitLaplacianPyramidGenerator	(	VPIStream	stream,
		uint32_t	backend,
		VPIImage	input,
		VPIPyramid	output,
		VPIPyramid	gaussianPyr,
		VPIBorderExtension	border
	)

#include <vpi/algo/LaplacianPyramid.h>

Computes the Laplacian pyramid from the input image.

Note that the coarsest level of the Laplacian pyramid is equivalent in concept to that of the Gaussian pyramid. However, in cases where the Laplacian pyramid output format has less positive dynamic range than the input format, ie input format is VPI_IMAGE_FORMAT_U8 and output format is VPI_IMAGE_FORMAT_S8 or U16 and S16, the pixel values of the output in the coarsest level are divided by 2 in order to avoid overflow.

Parameters

[in]	stream	The stream where the operation will be queued in.
[in]	backend	VPI backend that will execute the algorithm.
[in]	input	Input image. Supported formats are: VPI_IMAGE_FORMAT_U8 VPI_IMAGE_FORMAT_U16 VPI_IMAGE_FORMAT_F32
[out]	output	Where the resulting Laplacian pyramid will be written to. It must have been created with the desired scale and number of levels. Supported formats: VPI_IMAGE_FORMAT_S8 (only for 8-bit inputs) VPI_IMAGE_FORMAT_S16 (only for integer inputs) VPI_IMAGE_FORMAT_F32
[out]	gaussianPyr	If not NULL, defines where the intermediate Gaussian pyramid will be written to. It must have been created with the desired scale and number of levels.
[in]	border	Border extension to be used when sampling pixels outside the image border.

Returns

an error code on failure else VPI_SUCCESS.